A company has 6 officers and 5 directors (11 different people). In how many ways can a committee of 4 be selected from these 11 people so that the following hold? (a) 2 members are officers and 2 are directors. ways (b) 3 members are officers and 1 is a director. ways (c) All the members are officers. ways
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
A company has 6 officers and 5 directors (11 different people). In how many ways can a committee of 4 be selected from these 11 people so that the following hold?
ways
(b) 3 members are officers and 1 is a director.
ways
(c) All the members are officers.
ways
(d) There are no restrictions.
ways
Trending now
This is a popular solution!
Step by step
Solved in 4 steps